Sewing machine



FIG. 1 is a left front top perspective view of a sewing machine showingmy new design;

FIG. 2 is a right front top perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The ornamental design for a sewing machine, as shown and described.